In the times of COVID-19, you might have to work from home. That is well and good because you get to continue earning while staying safe from the virus.
Working from home means you have to stay connected virtually. You may have to work in front of a computer or gadget for extended periods.
This could pose a health risk, especially to your eyes. Recent research sponsored by The Vision Council has shown that 59 percent of people who routinely use computers and digital devices experience symptoms of digital eye strain (also called computer eye strain or computer vision syndrome).
Digital eye strain is an incredibly common issue in a world dominated by various screens. It happens when your eyes have been focusing too long – like when your muscles ache after a long workout. With eye strain, however, you can end up doing long-term damage by not addressing it – all the more likely when you’re tired, overworked eyes start to feel like a given part of your existence.
Eye strain may manifest in different ways for different people: they might feel itchy, sore, or even like they’re burning. They might be overly watery, or very dry. You might have difficulty focusing, a pounding headache, or even start to see the image in front of you blur.
According to www.techradar.com, your retina is a delicate thing, too, and can be highly sensitive to the kind of blue-wavelength light used in most LED screens. When blue light hits certain proteins in the retina, it can start harming (or killing) crucial photoreceptor cells – which don’t regenerate either.
Here are 9 easy steps you can take to reduce your risk of eye strain and other common symptoms of computer vision syndrome (CVS):
1. Get a comprehensive eye exam.
It is important to have a yearly comprehensive eye exam to prevent or treat computer vision problems.
During your exam, tell your eye doctor how often you use a computer and digital devices at work and home.
Measure how far your eyes are from your screen when you sit at your computer and bring this measurement to your exam so your eye doctor can test your eyes at that specific working distance.
2. Use proper lighting.
Excessive bright light either from outdoor sunlight coming in through a window or from harsh interior lighting can cause eye strain. When you use a computer, your ambient lighting should be about half as bright as that typically found in most offices.
Eliminate exterior light by closing drapes, shades, or blinds. Reduce interior lighting by using fewer light bulbs or fluorescent tubes, or use lower intensity bulbs and tubes.
Also, if possible, position your computer screen so windows are to the side, instead of in front or behind it.
Try reducing the number of fluorescent tubes installed above your computer workspace if you are bothered by overhead lighting.
3. Minimize glare.
Glare from light reflecting off walls and finished surfaces, as well as reflections on your computer screen also can cause computer eye strain. Consider installing an anti-glare screen on your display and, if possible, paint bright white walls a darker color with a matte finish.
If you wear glasses, purchase lenses with anti-reflective (AR) coating. AR coating reduces glare by minimizing the amount of light reflecting off the front and back surfaces of your eyeglass lenses.
4. Upgrade your display.
If you have not already done so, replace your old tube-style monitor (called a cathode ray tube or CRT) with a flat-panel LED (light-emitting diode) screen with an anti-reflective surface.
Old-fashioned CRT screens can cause a noticeable “flicker” of images, which is a major cause of computer eye strain. Even if this flicker is imperceptible, it still can contribute to eye strain and fatigue during computer work.
Complications due to flicker are even more likely if the refresh rate of the monitor is less than 75 hertz (Hz). If you must use a CRT at work, adjust the display settings to the highest possible refresh rate.
When choosing a new flat panel display, select a screen with the highest resolution possible. Resolution is related to the “dot pitch” of the display. Generally, displays with a lower dot pitch have sharper images. Choose a display with a dot pitch of .28 mm or smaller.
Also, choose a relatively large display. For a desktop computer, select a display that has a diagonal screen size of at least 19 inches.
5. Adjust your computer display settings.
Adjusting the display settings of your computer can help reduce eye strain and fatigue. Generally, these adjustments are beneficial:
- Brightness: Adjust the brightness of the display so it’s approximately the same as the brightness of your surrounding workstation. As a test, look at the white background of this Web page. If it looks like a light source, it’s too bright. If it seems dull and gray, it may be too dark.
- Text size and contrast: Adjust the text size and contrast for comfort, especially when reading or composing long documents. Usually, black print on a white background is the best combination of comfort.
- Color temperature: This is a technical term used to describe the spectrum of visible light emitted by a color display. Blue light is short-wavelength visible light that is associated with more eye strain than longer wavelength hues, such as orange and red. Reducing the color temperature of your display lowers the amount of blue light emitted by a color display for better long-term viewing comfort.
6. Blink more often.
Blinking is very important when working at a computer; blinking moistens your eyes to prevent dryness and irritation. It will also help reduce eye strain.
When staring at a screen, people blink less frequently — only about one-third as often as they normally do — and many blinks performed during computer work are only partial lid closures, according to studies.
Tears coating the eye evaporate more rapidly during long non-blinking phases and this can cause dry eyes. Also, the air in many office environments is dry, which can increase how quickly your tears evaporate, placing you at greater risk for dry eye problems.
If you experience dry eye symptoms, ask your eye doctor about artificial tears for use during the day.
To reduce your risk of dry eyes during computer use, try this exercise: Every 20 minutes, blink 10 times by closing your eyes as if falling asleep (very slowly). This will help rewet your eyes.
7. Exercise your eyes.
Another cause of computer eye strain is focusing on fatigue. To reduce your risk of tiring your eyes by constantly focusing on your screen, look away from your computer at least every 20 minutes and gaze at a distant object (at least 20 feet away) for at least 20 seconds. Some eye doctors call this the “20-20-20 rule.” Looking far away relaxes the focusing muscle inside the eye to reduce fatigue.
Another exercise is to look far away at an object for 10-15 seconds, then gaze at something up close for 10-15 seconds. Then look back at the distant object. Do this 10 times. This exercise reduces the risk of your eyes’ focusing ability to “lock-up” (a condition called accommodative spasm) after prolonged computer work.
Both of these exercises will reduce the risk of computer eye strain. Also, remember to blink frequently during the exercises to reduce your risk of computer-related dry eye.
8. Modify your workstation.
If you need to look back and forth between a printed page and your computer screen, place the written pages on a copy stand adjacent to your screen.
Light the copy stand properly. You may want to use a desk lamp, but make sure it doesn’t shine into your eyes or onto your computer screen.
Poor posture also contributes to computer vision syndrome. Adjust your workstation and chair to the correct height so your feet rest comfortably on the floor.
Position your computer screen so it’s 20 to 24 inches from your eyes. The center of your screen should be about 10 to 15 degrees below your eyes for comfortable positioning of your head and neck.
9. Consider computer glasses.
For the greatest comfort at your computer and to reduce eye strain, you might benefit from having your eye doctor modify your eyeglasses prescription to create customized computer glasses. This is especially true if you normally wear contact lenses, which may become dry and uncomfortable during extended screen time.
Computer glasses also are a good choice if you wear bifocals or progressive lenses because these lenses generally are not optimal for the distance to your computer screen.
Also, you may want to consider photochromic lenses or lightly tinted lenses for computer eyewear to reduce your exposure to potentially harmful blue light emitted by digital devices. Ask your eye doctor for details and advice.